MC9S12B256CFU - 16-bit 256KB Flash Automotive MCU | NXP
Référence : MC9S12B256CFU ✗ Fin de vieMC9S12B256CFU Présentation
A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals into one device. In the product hierarchy, the MC9S12B256CFU is a 16-bit microcontroller, a CISC-based embedded controller, a flash-memory MCU, and a semiconductor. HCS12 devices are intended for embedded control systems where deterministic peripheral access, communication, timing, and automotive-style multiplexing can be useful.
The verified data identifies three headline characteristics: 16-bit architecture, 256KB flash, and operation at 2.5V or 5V. One marketplace listing also specifies a 50MHz speed, but that value should be checked against the exact datasheet and clock configuration before relying on it. The family is described as supporting automotive multiplexing applications and offering pin compatibility across different memory and peripheral options for scalable designs.
The HCS12 CISC architecture differs from many low-cost 8-bit MCUs by providing a wider internal word and register-oriented control environment. Flash storage permits firmware to be retained in the controller itself, reducing external program-memory requirements. The exact list of timers, serial interfaces, analog modules, CAN functions, interrupt sources, and package-level multiplexing options is not supplied in the verified excerpts and therefore requires confirmation from the manufacturer datasheet.
Typical use cases include automotive body and multiplexing controllers, embedded automotive modules, industrial control equipment, and legacy embedded platforms that already depend on HCS12 software tools. A migration should preserve the package footprint, pin multiplexing, clock setup, memory map, interrupt vector table, and development-tool compatibility. Replacing this MCU with a different architecture is not automatically a drop-in substitution even when flash size appears similar.
Designers should verify the PQFP pin assignment, power rails, decoupling, external crystal or clock options, reset behavior, programming connector, and exposed peripheral limits against the exact MC9S12B256 datasheet. For production sourcing, confirm NXP lifecycle status, automotive qualification details, errata, and toolchain support. The available LCSC listing reports in-stock status and a starting price, but current commercial availability and lead time should be reconfirmed.
This page consolidates the verified 16-bit, 256KB, 2.5V/5V, 50MHz listing data, source links, sourcing questions, and engineering cautions. It does not invent undocumented peripheral specifications or claim a drop-in replacement where verified pin and parameter data is absent.
Alternatives de remplacement direct pour MC9S12B256CFU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesMC9S12B256CFU Valeurs maximales et caractéristiques électriques
| Architecture | 16-bit HCS12 CISC |
| Flash Memory | 256KB |
| Listed Maximum Speed | 50MHz |
| Tension d'alimentation | 2.5V or 5V |
| Core Family | MC9S12B |
| Application Focus | Automotive multiplexing |
| Boîtier | 80-pin PQFP |
| Program Memory Type | Flash |
| Manufacturer | NXP |
| Original Family Brand | Freescale Semiconductor |
| Largeur du bus de données | 16-bit |
| CPU Instruction Class | CISC |
| Type de montage | Surface mount |
Guide de configuration des broches du MC9S12B256CFU 80-pin pqfp
Configuration des broches du MC9S12B256CFU (boîtier 80-pin pqfp). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour MC9S12B256CFU.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MC9S12B256CFU convient pour 6 applications: Automotive Multiplexing Controller, Body Electronics Control Module, Automotive Communication Gateway, Industrial Embedded Control, Legacy HCS12 Platform Maintenance, Programmable Automotive Peripheral Node.
Automotive Multiplexing Controller
The MC9S12B256CFU fits automotive multiplexing control because the verified family information identifies automotive multiplexing applications and the device provides a 16-bit HCS12 CISC core with 256KB flash. Place the controller where it coordinates body-related inputs, outputs, and communication tasks through the MC9S12B peripheral set. The 80-pin PQFP provides the external signal access needed for a multiplexed node, but the designer must verify the exact pin multiplexing and electrical limits from the family datasheet before assigning connectors or loads.
Recommandé
Body Electronics Control Module
Use the MC9S12B256CFU for body electronics when the design needs a retained firmware image and an automotive-oriented 16-bit control architecture. Its verified 256KB flash provides room for application code, diagnostics, calibration data, and communication handlers, while the 2.5V/5V listing identifies the intended supply class. The controller can manage discrete inputs and outputs only after the exact package pin multiplexing, I/O levels, timing, and peripheral assignments are checked in the datasheet.
Recommandé
Automotive Communication Gateway
The MC9S12B256CFU can serve as a communication gateway when an existing HCS12 design needs a 16-bit controller with 256KB flash and the verified MC9S12B automotive orientation. The gateway role typically involves protocol formatting, message routing, diagnostics, and fault monitoring. Confirm the available serial, CAN, and timer resources in the exact datasheet, since the supplied snippets do not enumerate those peripherals or their electrical limits.
Recommandé
Industrial Embedded Control
The MC9S12B256CFU is suitable for legacy or industrial embedded-control platforms that require a 16-bit CISC controller, onboard flash, and a fixed 80-pin PQFP footprint. It can support sequencing, supervisory logic, and communication-intensive control when the application already has HCS12 software assets. The main engineering tradeoff is ecosystem maturity: verify current compiler, debugger, programmer, and documentation support before committing to a new production platform.
Recommandé
Legacy HCS12 Platform Maintenance
For maintenance of an existing HCS12 product, the MC9S12B256CFU offers a 16-bit controller with 256KB flash in the verified 80-pin PQFP package. Keeping the original family can reduce software and hardware migration risk when peripheral mappings and board footprints are already established. However, procurement teams should check lifecycle status, errata, remaining inventory, and the availability of programming and debugging tools before using a distributor listing as evidence of long-term supply.
Recommandé
Programmable Automotive Peripheral Node
A programmable peripheral node can use the MC9S12B256CFU when the design benefits from local flash-resident logic and an automotive-oriented control core. The controller may respond to sensor inputs, activate outputs, and participate in diagnostic communication, subject to the actual pin and peripheral assignments. Because the supplied data does not specify pin-level multiplexing or package dimensions beyond 80-pin PQFP, perform a symbol-by-symbol comparison against the existing PCB before release.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC9S12B256CFU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Package | 80-pin PQFP |
| Brand | NXP Semiconductors |
| Architecture | 16-bit HCS12 CISC |
| Flash Memory | 256KB |
| Supply Voltage | 2.5V or 5V |
| Listed Speed | 50MHz |
| Application Focus | Automotive multiplexing |
| Core Family | MC9S12B |
Principaux différenciateurs
- Verified 16-bit HCS12 CISC positioning (vs MC9S12E256CFUE)
- Explicit automotive multiplexing family positioning (vs MC9S12E256CFUE)
- Documented sourcing path (vs Generic MCU alternatives)
Notes de conception
Do not treat a same-family or same-flash MCU as a drop-in replacement without a complete package and peripheral comparison. For MC9S12B256CFU, verify the 80-pin PQFP footprint, pin multiplexing, power pins, ground connections, reset behavior, clock pins, and every used signal against the authoritative datasheet. Also compare the memory map, interrupt vector table, timer assignments, serial channels, and programming requirements. The verified cross-reference search did not establish a qualifying substitute.
The verified supply designation is 2.5V or 5V. Confirm which supply mode applies to the selected operating configuration, then design decoupling and voltage-level constraints from the manufacturer electrical characteristics rather than from the marketplace listing alone. Check input voltage tolerances, output-driver levels, reset behavior, and any external interface domains. Validate the power tree with the worst-case input, temperature, load, and peripheral configuration.
Preserve the 80-pin PQFP land pattern and verify pin numbering, orientation, thermal or exposed-pad requirements, and solder-mask clearance using the official package drawing. Place required bypass capacitors close to the device power pins and route reset, clock, and communication signals away from noisy switching nodes. Because the complete pinout was not supplied in the verified excerpts, do not authorize layout release until every connected net has been checked against the manufacturer package diagram.
Use the manufacturer junction-temperature and package thermal data for production calculations; those figures are not present in the supplied excerpts. Check the 80-pin PQFP thermal performance against ambient temperature, switching activity, I/O loading, and board copper. A 50MHz listing value does not by itself determine junction temperature or safe operating margin, so validate the clock and peripheral configuration with the actual power measurement.
For clock, communication, or sensor interfaces, establish signal integrity from the actual pin ratings and peripheral timing rather than from the family description. Check edge rates, pull-up or pull-down requirements, input thresholds, external bus loading, and termination. If the MCU replaces an existing automotive node, compare signal names and alternate-function selections line by line, because package compatibility does not guarantee identical peripheral routing.
Informations de conformité
The supplied search data identifies automotive multiplexing applications but does not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. Confirm compliance using the current manufacturer product documentation and supply-chain declarations.
